const test = () => {
  console.log(1);
}

var obj = {
  say: () => {
    // 包裹在对象里面
    console.log('say log 哈哈哈');
  }
}

function gogo() {
  let a = 1

  console.log(a);

  return () => {
    console.log(222);
  }
}

